The correct action is to restore the DB instance from the latest automated snapshot. This is the proper recovery method because InnoDB corruption in RDS MySQL indicates physical damage to the tablespace files, often from a crash or hardware failure, and automated snapshots provide a consistent, point-in-time copy of the entire database that bypasses the corrupted files entirely. On the AWS Certified Database Specialty DBS-C01 exam, this scenario tests your understanding that RDS-managed MySQL does not allow direct file-level repairs or access to InnoDB recovery tools like innodb_force_recovery, so snapshot restoration is the only supported path to data integrity. A common trap is attempting to use the mysqlcheck or REPAIR TABLE commands, which cannot fix physical corruption and may worsen the damage. Memory tip: when you see InnoDB corruption in RDS, think “snapshot, not surgery”—restore the whole, don’t try to patch the broken piece.
DBS-C01 Management and Operations Practice Question
This DBS-C01 practice question tests your understanding of management and operations. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Exhibit
Refer to the exhibit. A database specialist receives the following Amazon CloudWatch Logs excerpt from an Amazon RDS for MySQL DB instance:
2024-11-15 10:23:45 UTC [ERROR] [MY-013118] [InnoDB] Page [page id: space=5, page number=1234] log sequence number 567890 is in the future! Current system log sequence number 567800.
2024-11-15 10:23:46 UTC [ERROR] [MY-011825] [InnoDB] Unable to purge a record because it is in a non-tablespace page.
2024-11-15 10:24:01 UTC [ERROR] [MY-013114] [InnoDB] Database page corruption on disk or a failed file read of page [page id: space=5, page number=1235]. You may have to recover from a backup.
A database specialist sees the above error log entries from an Amazon RDS for MySQL DB instance. Which action should be taken to resolve the issue?
Refer to the exhibit. A database specialist receives the following Amazon CloudWatch Logs excerpt from an Amazon RDS for MySQL DB instance:
2024-11-15 10:23:45 UTC [ERROR] [MY-013118] [InnoDB] Page [page id: space=5, page number=1234] log sequence number 567890 is in the future! Current system log sequence number 567800.
2024-11-15 10:23:46 UTC [ERROR] [MY-011825] [InnoDB] Unable to purge a record because it is in a non-tablespace page.
2024-11-15 10:24:01 UTC [ERROR] [MY-013114] [InnoDB] Database page corruption on disk or a failed file read of page [page id: space=5, page number=1235]. You may have to recover from a backup.
A
Increase the allocated storage for the DB instance.
Why wrong: Incorrect: Storage size does not fix logical corruption.
B
Restore the DB instance from the latest automated snapshot.
Correct: Restoring from a clean snapshot is the standard recovery method for page corruption.
C
Reboot the DB instance to clear the error.
Why wrong: Incorrect: Reboot will not fix page corruption; the error will reoccur.
D
Run the mysqlcheck command to repair the corrupted tables.
Why wrong: Incorrect: RDS does not provide shell access; mysqlcheck cannot be run directly.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Restore the DB instance from the latest automated snapshot.
The error log entries indicate corruption in the InnoDB tablespace, likely due to a crash or hardware failure. Restoring from the latest automated snapshot is the correct action because it provides a consistent, point-in-time recovery of the entire database, including all table structures and data, without relying on potentially corrupted files. This approach ensures data integrity and avoids further damage that could occur from attempting repairs on a corrupted instance.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Increase the allocated storage for the DB instance.
Why it's wrong here
Incorrect: Storage size does not fix logical corruption.
✓
Restore the DB instance from the latest automated snapshot.
Why this is correct
Correct: Restoring from a clean snapshot is the standard recovery method for page corruption.
Related concept
Read the scenario before looking for a memorised answer.
✗
Reboot the DB instance to clear the error.
Why it's wrong here
Incorrect: Reboot will not fix page corruption; the error will reoccur.
✗
Run the mysqlcheck command to repair the corrupted tables.
Why it's wrong here
Incorrect: RDS does not provide shell access; mysqlcheck cannot be run directly.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse table-level repair commands (like mysqlcheck or REPAIR TABLE) with the need for a full database restore, not realizing that InnoDB corruption typically requires point-in-time recovery from a backup rather than a simple repair operation.
Detailed technical explanation
How to think about this question
Amazon RDS for MySQL uses InnoDB as the default storage engine, which relies on a doublewrite buffer and crash recovery mechanisms to maintain ACID compliance. When corruption occurs in the InnoDB system tablespace (e.g., ibdata1), the database may fail to start or produce errors like 'InnoDB: Database page corruption on disk' or 'InnoDB: Assertion failure'. Restoring from an automated snapshot is the recommended recovery path because RDS does not provide direct access to underlying files for manual repair, and the innodb_force_recovery parameter can be used as a temporary measure to export data before a full restore.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Management and Operations — This question tests Management and Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Restore the DB instance from the latest automated snapshot. — The error log entries indicate corruption in the InnoDB tablespace, likely due to a crash or hardware failure. Restoring from the latest automated snapshot is the correct action because it provides a consistent, point-in-time recovery of the entire database, including all table structures and data, without relying on potentially corrupted files. This approach ensures data integrity and avoids further damage that could occur from attempting repairs on a corrupted instance.
What should I do if I get this DBS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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